Mayor Mitch Landrieu greets members of the New Orleans Police Department's 181st recruit class to celebrate the opening of the renovated $3 million Training Academy on Paris Ave. in New Orleans, La. Tuesday, Sept. 5, 2017, next door to the renovated $2.4 million NOPD Third District Station.

There have been rumblings from anonymous sources lately that outgoing New Orleans Mayor Mitch Landrieu could be a candidate for the 2020 Democratic presidential nomination, but I wouldn't read too much into that.

Nor would I read too much into the first poll results measuring such a scenario.

Just for kicks, the New Orleans Advocate and WWL-TV included a head-to-head matchup between Landrieu and Donald Trump in its new poll of 500 registered New Orleans voters, which was conducted Sept. 25-27 by the Clarus Research Group and released this week.

And the good news for Landrieu is this: Among his constituents, he'd win easily, 64-16 percent.

Now, what that says about Landrieu is up for debate. At 57 percent, his approval rating is pretty strong, given frustration over drainage and crime. So it could be a vote of confidence.

More likely it's a show of partisanship, as well as a referendum on a president whose policies are particularly unfriendly to urban centers. New Orleans is a deeply Democratic city — 81 percent of the vote there went to Hillary Clinton in November, and just 15 percent to Trump — and the president hasn't exactly won new friends since then.

If I had to guess, I'd say 64 percent of New Orleanians would opt for any Democrat, and perhaps some Republicans, over Trump. Maybe even more, since 18 percent of those polled said they'd vote for neither Landrieu nor Trump.

Bottom line: If Landrieu has any intention of trying to go national, he'll need a whole lot more data. New Orleanians know him best, but this poll probably says more about them than it does about him.

Follow Stephanie Grace on Twitter, @stephgracela.